The recent Realtek driver tries to assign an extra input via theheadphone plug when only a single input source is found. The codeworked on Samsung Q1, but it broke ASUS 1015 where the mic is adigital-mic and only a specific ADC works.

This patch fixes the assignment of ADC in the shared mic/hp case.Instead of assuming the single ADC at first, reduce the ADCs aftertrying to assign both mic and HP pins.